转发：https://www.iteye.com/blog/wiselyman-2214626
package com.wisely.web;
import java.util.Random;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class SSEController {
//注意produces="text/event-stream"
@RequestMapping(value="/push",produces="text/event-stream")
public @ResponseBody String push(){
Random r = new Random();
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return "data:Testing 1,2,3" + r.nextInt() +"\n\n";
}
}
<div id="msg_from_server"></div>
<script type="text/javascript" src="<c:url value="/js/jquery.js" />"></script>
<script type="text/javascript">
if (!!window.EventSource) {
var source = new EventSource(‘push‘); //为http://localhost:8080/testSpringMVC/push
s=‘‘;
source.addEventListener(‘message‘, function(e) {
s+=e.data+"<br/>"
$("#msg_from_server").html(s);
});
source.addEventListener(‘open‘, function(e) {
console.log("连接打开.");
}, false);
source.addEventListener(‘error‘, function(e) {
if (e.readyState == EventSource.CLOSED) {
console.log("连接关闭");
} else {
console.log(e.readyState);
}
}, false);
} else {
console.log("没有sse");
}
</script>
原文：https://www.cnblogs.com/Jeely/p/11950263.html